Year	kt
1990	356297.9
1991	380691.3
1992	368655.7
1993	349524.6
1994	344475.4
1995	352283.1
1996	367959.6
1997	359140.5
1998	381182.3
1999	375003.6
2000	373235.8
2001	376860.3
2002	371167.2
2003	376838.7
2004	377948.5
2005	380816.1
2006	371741
2007	363052.2
2008	358211.2
2009	343882.5
2010	347940.1
2011	335031.9
2012	338315.4
2013	338453.1
2014	306017.4
2015	311175.4
2016	313835.2
2017	317721.2
2018	306948.4
2019	300561.6
2020	267154.7